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e, /the application of a gentle heat.

UNITED STATES PATENT OFFICE.

' JAMES ROOTS, or BAKER STREET, MIDDLESEX, ASSIGNOR TO DOM IEE a 00., or LONDON, ENGLAND.

PROCESS OF PREPARING BURNING-OIL FOR LAMPS AND RESULTING PRODUCT.

SPECIFIC AlION forming part of Letters Patent No. 340,522, dated April 20, 1886. Application filed October 26, 1885. Serial No. 180,969. (No specimens.)

To all whom it may concern.-

Be it known that 1, JAMES Room, a subject of the Queen of Great Britain, residing at Baker Street, Middlesex, England, have in- 5 vented certain new and useful Improvements in the Process of Preparing Burning-Oils for Lamps and Resulting Product; and I do hereby declare that the following is a full, clear, and exact description of the invention, which IO will enable others skilled in the art to which it appertains to make and use the same.

This invention has for its object improvements in the preparation of oils for burning in lamps.

1 I take the oils at present employed for burning in lamps from a wick and improve their illuminating quality by dissolving naphthaline in them in proportion of ten or fifteen per cent. Oolza-oil may be improved in this way; so, 20 also, may sperm-oil and paraffine or earth oil.

In carrying out my invention I usually hasten the solution of the naphthaline in the oil by The oil, if afterward cooled to about 40 Fahrenheit, will 25 deposit any excess of naphthaline, if such should have been used in the preparation. The quantity of naphthaline which oils will retain in solution at this temperature varies somewhat with the nature of the oil. The

30 more volatile petroleu ms will retain more than the less volatile and more than colzaoil and sperm-oil.

In practice I have found that ten per cent., by weight, of naphthaline dissolvedin animal,

3 5 vegetable, and light mineral oils, and eight per cent. dissolved in the heavy mineral oils, produces the best results, as these oils hold well these respective quantities in solution at ordinary temperatures.

The solution thus produced is burned directly in lamps of such construction as commonly employed for burning the respective oils, and in the same manner as the oils alone are now burned.

The various burning-oils thus enriched by 43 dissolving naphthaline therein when used possess greater illuminating properties than the various oils when used alone.

I am aware that it has heretofore been proposed to mix solid and liquid hydrocarbons to 5 be burned'with oxygen in lamps specially constructed to this end; also, to mix paraffine with tallow to make a burning-fluid, and also to mix camphor with hydrocarbon oils to deodorize them. 5

Having thus described my invention and acknowledged the state of the art so as to specifically ascertain my improvement, I claim 1. The process of improving the illuminat-- ing quality of hydrocarbon fluids for burning 6 in the ordinary way in ordinary lamps, consisting in dissolviugin such fluids naphthaline in proportion of from, say, eight to fifteen per cent, .according to the volatility of the fluid, substantially as described. 6

2. The burning-fluid herein described, consisting of an admixture of hydrocarbon oil such as petroleum, colza, or sperm and from eight to fifteen per cent. of naphthaline.

JAMES ROOTS.

Witnesses:

EDWARD CARPENAEL, WIL IAM ROXBURY. 

